7672447666 has 8 divisors (see below), whose sum is σ = 12393953964. Its totient is φ = 3541129680.

The previous prime is 7672447609. The next prime is 7672447697. The reversal of 7672447666 is 6667442767.

It can be written as a sum of positive squares in 2 ways, for example, as 7418204641 + 254243025 = 86129^2 + 15945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147547045 + ... + 147547096.

Almost surely, 2^7672447666 is an apocalyptic number.

7672447666 is a deficient number, since it is larger than the sum of its proper divisors (4721506298).

7672447666 is a wasteful number, since it uses less digits than its factorization.

7672447666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295094156.

The product of its digits is 14224896, while the sum is 55.

The square root of 7672447666 is about 87592.5091888570. The cubic root of 7672447666 is about 1972.3227231455.

The spelling of 7672447666 in words is "seven billion, six hundred seventy-two million, four hundred forty-seven thousand, six hundred sixty-six".